Coffeepot



June 14,1927. 1,632,342

, v, LAMBERT COFFEEPOT Filed April 5. 1924 f @ATTORNEYS Patented June 14, 1927.

1U- NlT'ED* STA S' e 1,632,342 rA'rENr onirica.

VICTOR EAMBR'D, 0F BROOKLYN NEW'YOR'K', ASSIGrNOR` T0 AARON M. SLOSS, OF Y i YORK, N. Y.

Application led April 5, 1924. Serial llTo. 704,396.

rfhis invention relates to coffee pots such vas are in ordinary domestic use, and'more especially to that type of coffee pot in which the coffee is made by a process of percolation.

ln pots of this type, generally known as iercolators, it is customary to support the coffee, which has been ground to a considerable degree of fineness, in a suitable container or receptacle Which is separated from the main body of Water in the pot. This container or receptacle for the ground coffee frequently takes the form of a metal cylinder, the Walls of which are perforated. The container is supported in the pot lby appropriate means, andnextending through it and resting on the bottoni of the pot is a tube which has inlet 'openings at its lower end. This tube has a discharge opening Which lies above the gi'ound coffee and when the Water Within the body of the pot is hea-ted the pressure generated causes the iva-ter to be forced upwardly through Ythe tube and to be discharged at the upper end thereof. rl'he Water so discharged :from the tube flows downwardly through the body of' ground coffee and thence into the main body of' liquid in the pot.

Ordinarily With this type of pot, which is in common use, a quantity of cold Water sufficient to make the desired number of oups of coffee .is placed in the bottom ofthe pot, and thereafter the coffee container with its tube is put in position. The Water is then heated and as steam is generated the Water is forced upwardly through the tube and flows back through the coffee. This process usually continues for a considerable length of time so that the coffee liquid is repeatedly passed through the coffee granules.I

lt is Well known thatliquidcoffee of the best quality is .made by using the granularmaterial ground almost to the `fineness of powder, and then causing boiling hot We ter to pass through this granular material but once. Coffee so made has a finer flavor than that in which the liquid repeatedlyl passes through the granules and it is probable thatl such a single passage of the hot Water through the granules fails to extract there from certain deleterious substances such as tannic acid, etc., which repeated extraction would cause to dissolve. p i

The object of the present invention is to provide a coffee pot so. arranged that in making coffee the Water used is raised tothe properl boiling temperature before it` is brougl'it into contact With the granular coffee, and that this Water is caused to pass but once through the granules. The liquid coffee madein this pot, therefore, results from a single extraction of the groundcoffee ber' ries and, therefore, has the des-fred high quality. rlzhe coffee pot constructed in accord-ance with this invention 'ismade un of but a few parts which may easily be dismantled soi that the pot may be kept in a sanitary condition, fand these parts are strongly constructed and not subject to Wear.

ln that embodiment of my invention which l now prefer, I make use of a metallic vessel ofthe usual tapering `forni. lhis vessel may be constructed of any desiredA metal, depending onthe commercial grade of pot that is tol be made. lvlonnted in the upper end lof the vessel is an annular mem berfvvhich has a flange which overlies the rim of the vessel, and another flange which extends downwardly and; contacts with the inner vWall of the vessel. Mounted on this annular member and extending therethrough into the vessel, is a cylindrical member having its lovver end closed. This cylindrical vessel may be made of vireous material or vof enameled metal, and provides the compartment for the liquid coffee. The vessel has the usual spout which is connected by a tube to an outlet formed in the lower vend of the cylindrical member, and this connection is made removable so that the cylin; vdrical vessel may be disconnected from the spout and removed from the pot. The containerfor the coffee is a metallic receptacle,

one Wal-l of which may be in the form of a screen of fine mesh. A metallic cover which lies Within the container serves to keep the coffee from being dislodged. y At one side `of the cylindrical member is mounted in the annular` member a siphon tube which eX- tends downwardly into the vessel to a point near the bottoni.` Connected to the upper end ofthe tube is a nozzle which extends over jtol a.` point centrallyofthe coffee com* partinient: The pot is provided with a cover of the usual type? and a handle. W'ith the.k pot so arranged, the codes and Water compartments 1re maintained separate, and the Water kcompartment is closed so that the pressure Ygenerated by the steam'vvill serve the purpose oftransferring the liquid frointhe water compartment into the coffee compartment.

In the accompanying drawings I have il lustrated a preferred vembodiment of the invention, and in Vthese drawings,

sired, such as nickle, silver' plate, and the like. The vessel is provided. with a handley 6 of the usual term, `and its rim is formed with a bead 7 by spinning the edge of the side wall outwardly, as illustrated,

Mounted within the upper end of the vessel is an annular member 8 which has a curved flange portion 9 which is yadapted to overlie the beard 7, andanother flange 10 which is formed so` as to lie in contact with the side wall of the vessel. Supported on the annular member is a .cylindrical member 11 having its lower end closed and having a lateral flange 12 along its upper edge which ovcrlies the edge ot the annular mem" ber 8. rlhis cylindrical member is preierably made ot' ,vitreous material such as porcelain, although it may also be made oft metal with or without an enamel surface.

' Mounted on the vessel near, the lower end thereof, is a spout 18 of the usual form,

' and welded Vor otherwise secured to the pot in communication with the support is a tube 1li, the inner end ot which hes Just below the end of the cylindrical member 11 v and is provided with an internally threaded endv 15. The cylindrical member 11 is formed with an outlet 16 at its lowerV end and extending through this outlet is the threaded shank 17 otl a bushing 18 provided with a wing nut 19 at its upper end. In-

f serted between the lower ,tace ot the bushing andthe cylindricalmember A11 is a packing washer 20 and a. similar washer 21 lies between the end of the tube 15 and the outer surface of the member 11. lViththis arrangement the wing nut Vmay be tightened so as to hold the tube 17 firmly in position against the end of the cylindrical member, thus making'a tightconnection between the interior of the `member 11 and the support. vThe tube 14 iszformed so as to have a sutiicent degree of flexibility to permit the necessary flexure when the wing nut is tightened. V Y

Vith this arrangement it will Vbe seenl thatv there is provided a compartment for liquidfcofee which is altogether separate Jfrom that part of the vessel in which the water is'contained, and the vessel may ac-Y cordingly be said to be divided into a coliee compartment and a Vwater compartment by a partition which is, in this case, made up of two parts, the annular member 8, and the cylindrical member 11. Also mounted at its upper end in the annular member 8 is afsiphon tube 22, the lower end of which isl enlarged as indicated at 23. This siphon 'tubeextends downwardly to a point near the lower end of the water compartment and at its upper end is provided with a sleeve 24. in which is mounted the stem of a nozzle 25. This stem is provided with a stud 26 which tits in a bayonet slot 27 formed in the sleeve 2li and the slot is so arranged that `the nozzle may` lic either in the position indicated in Fi g. 1, in which the discharge end 28 lies over the'coffee compartment, or to the position indicated in F ig. 2, in which position the shank may be withdrawn from the sleeve. The nozzle 28 has a number ot fine perlorations formed in it.

The ground cofl'ee, which 'should be used in a linely divided condition, is placed in a cylindrical container 29 which has a bead 8G formed on its upper end andv is olf such size that it may be freely inserted into the cylindrical member V11 with the bead supporting it in proper relation thereto. The

lower wall 81 ot this container is formed with minute perfor-ations, or may, it dcsircd, be replaced by a line mesh screen which permits the liquid to pass therethrough but prevents the passage or the ground coffee. A perforated cover for the coffee, indicated generally at 82, is shown at This cover is in the torni ot a disc having a handle 3l extending tromits upper 'face and is providedwith peripheral recesses |The container2f) isformed with a circun'itci'ential bead 3G on which the cover is to rest and above the bead it is provided with inwardly extending knobs 8T which are intendedY to pass t-l'irough the recesses 35. The collec is lirst placed inthe bottoni ot the container i and the cover is then turned so that itmay be forced down against kthe bead 86 with the knobs .passing through the recesses. The cover is then `turned so that a portion oit its rim between the recesses bears against the knobs, thus locking the cover in position and holding thefcoffee against displacement. It will be noted that in a container so formed the collec lies at the lower end thereof a considerable distance` below the discharge nozzle so thatv the liquid discharging 'from the nozzle 28 will all be received inthe collee compartment and will not splash upon the Y annular member 8. i

The pot is provided with a domed cover 38 of the usual form, supported on the vessel byy meansof'a hinge 39, and also provided witha retaining member l0 which is intended to snapv over the bead 7, The rim of the cover is iianged inwardly as atv 41, so as to rest against. the flanged portion 9 of the annular member 8.

Also the annular member Sis provided with a threaded openingin which is to be screwed a plu g l2 provided with a wing nut'. The opening is located opposite the pointy at which thev siphon tube .is secured in the annular member. l d

iVhcn the coffee pot is to beplaced in use the annular member is mounted in position, asjllustrated in Fig. 1, and thereafter the cylindrical member is slipped in place and its' out-letv secured tothe inner end of the spout as shown. The coffee container is then filled and placed in the upper end of the annular member, and water is Vthen introduced into the water compartment through thev opening normally closed by the plug 4:2. Then the water compartment has `been filled te the required height. to make the desired number of cups of coffee, the plug is screwed in place and the water compartment is now tight. The pot is then placed over the usual burner and thewater in the water compartment is brought to a boiling temperature As the water boils pressure is generated in the water compartment and this pressure causes water to s'iphon up through the tube 22 and to be discharged into the coffee compartment above the container. The siphon tube is of such size that the water passes over into the coffee compartment in small conditions, however, it' will'be suflibientk to tainerin the manner described.

Y quantities, and thus passes through the massl therefrom.

` of ground coffee slowly. By reason of the fact that the water brought into contact with this ground coffee' is at the boiling temperature, and since the liquid coffee is `formed simply b'ya single passage of the waterthrough the granular material, the` coffee madeV by the pot is made under the most desirable conditions and, therefore, has the best fiavor and aroma. The pot is heated until as much coffee as desired has beenl made, but the heating may be conducted indefinitely because the end of the siphon tube lies a short distance above the bottom of the pot so that this bottom is always covered by a. layer of water. The pot cannot become dry inside so that the metal will be burned.

Then the pot is to be cleaned the coffee container is taken out of the cylindrical member and the ground coffee removed `is required but infrequently. The entire pot, however, may be taken apart, as will be clear, and all parts may be given a thorough cleaning when necessary. Under ordinary The container isthen sterilizedV I claim: i

`ll In a coffee pol'the' combination of a vessel having" an opening, an' ann'ulzirinenr berliaving a? flange overlying the edges of the opening, a cylindrical member having an open' end and aA closed end, supported by the annular" member with its closed end lying within the vessel, the two members wit-li the,y vesselv providing alcofl'ee compartment within the cylmdricalmember and a water compartment surrounding 1t, means mounted in' the cylindrical member for supporting granular coffee, a pipe' mounted .in the annular member and extending from a point nearV tlie bottom of the vessel' to a point above` the supported coffee, and a spout -mounted in the vessel and connected withthe coffee-compartment.

2. In a coffee pot thecombination of a vessel having an opening, a removable annular member having a flange overlying the edgesof the opening and serving to close the opening partially, a cylindrical member having a flange overlying the edges of the annular member to be supported thereby, this cylindrical member `having an open end and a closed end, the latter lying within the vessel', the two members and' the vessel providing a coffee compartment` within the cylindrical member and a water compartment which surrounds it, a container' for granular coffee mounted within the cylin-v drical member below the open end of the latter, a pipe extending' through thejannular member from a 4point near the bottom of the water compartmentto a point above the container, and a spout mounted in the wall of the vessel and'connected with the interior within the cylindrical member and a water` compartment which surrounds it,` a container for granular coffee mounted in the upper end of the cylindrical member, an open pipe' extending` from a point near the bottom of the water compartment to a. point above the container, a spout on the vessel connected with the interior of' the vcylindrieal membenvand a cover` secured to the vessel tol close the opening, this cover, when in closed position, serving'tolock the annular member in position.

llt5

Cil

' point near the bottom of the vessel, a removable spout securedto theend of the pipe and extendingover the open end oi the cylindrical member, and a spout on the vessel connected with the interior ofthe cylindrical Y member.

5. In a coffee pot the combination o'lia vessel havino' an o ienin, an annular member removably mounted in theupper end of the vessel and having a flange overlying 'the edges of the opening, a cylindrical member lsupported*by the annular member and having a closed end lying Within the vessel, the

two members and theV vessel providing a coffee compartment Within the cylindrical member and a Water compartment which surrounds it, a container for granular coflee mounted in the open endof the cylindrical member, a pipe extending from the lower end of the Water compartment to a point above the container, a spout mounted in the Wall of the vessel and Vconnected With the interior of the cylindrical member, and a normally closed aperture in the annular member through Which Water may be introduced y' into the fvvater compartment.

6. VIn a cofleepot the combination of a vessel having' an opening, Van annular member having a flange overlying the edges of the opening,

and extending intol the vessel beyond the annular member, this cylindrical member forming a coffee compartment which is surrounded by f a Water compartment, and a cover for the opening inthe vessel adapted, When in closed position, to loch the annular member against displacement;

7. In a codee pot of the class described,r

the combination of a vessel having an open end and adomed cover therefor, an annular member supported by the rim ofthe vessel at saidopen end, a cylindrical. member having a closed end and supported by the annu-` lar member, the cylindrical memberextending' into the vessel and forming compartment for liquid coffee', an outlet in the closed end of the cylindrical member, a container for ground coffee mounted in the open end ot the cylindrical member, a pipe mounted at one end in the annular memberpand ei;-

ftending into the vessel to a point near-'the a cylindrical member having a' closed end supported by theannular memberbot-tom, a nozzle removably connected With the upper end ot' the pipe and lying beneath the cover When the latter is closed, the said nozzle discharging above the container and a spout on the vessel connected by a pipe and a removable connection with the outlet in the cylindrical member.

i 8. In a coffee pot of the class described,

the combination of a vessel having an open end,la ring havin g a portion adapted to-overlie the rim of the vessel and a flange adapted to Contact with the side Wall thereof, a cylindrical member having a closed end and a flange adapted to overlie the ring and supportthe member, the latter extending into the vessel beyond the ring, a container for granular cofl'ee mounted in the cylindrical men'iber, a pipe mounted at oneenfd in the ring and extendinginto the vesselto a point near the bottom thereof, a nozzle connected yto `the upper end of the pipe and discharging into the cylindrical member above the container, and a spout on' the vessel connected tothe cylinc rical member. y Y

9. In a coffee pot, the combination'of a vessel having an open end, an annular member having a flange overlying the rim of the vessel at this end,'a cylindrical member having a closed end and an open end, the latter having a flange overlying the edge of the annular' memberl to be supported thereby, a

container for granular coffee mounted inthe open end of the cylindrical member and vhaving a flange overlying the edge of the latter, the granular coffee being supported at a point below the open end of the cylindrical member', a pipe mounted in "the annular member and extending to al point near the bottom ot' the vessel, this pipe being provided With a nozzle which discharges into the cylindrical member above the granular cofl'ee, a spout mounted on the vessel and connected with theinterior of the cylindrical member, a hinged cover mounted on the vessel and adapted, when in closed position, to overlie the flange of the annular member which rests Von the rim of the vessel, and means for vlocking the cover in closed position. Y

l0. In a coffee pot, the combination of a vessel having an opening, an annular member having a flange overlying the edges of the opening, a cylindrical member having a flange at its upper edge overlying the edge of Jthe annular member, removable screw- `means in the bottom of the cylindrical member holding it in fixed relation to the vessel, a container for granular codec Within the cvlindrical member, a pipe extending from near the'bottom of the vessel to afpoint over the container', and an outlet in connection With the bottom ofthe cylindrical member.

VICTOR LAMBERT. 

